Given both opponents called the flop, I suspect at least one has A3. In that case, I reckon you want to push out any marginal hands that might be ahead for high (one pair, two pair, and strong high draws which could make on the river). Obviously no A3s are folding, but you're likely 3/4ing most A3s here (at least more often then you're 3/4ed yourself). So by my reckoning the important factors are to remove any winning (but vulnerable) high hands by betting to clean up that end of the pot (or at least make high draws pay) and to make any A3 with no high pay a little more, which I think is best achieved by betting the pot.
My mindset here is "push" rather than pull, because the value of winning a whole pot uncontested tends to be greater than risking letting multiple players in to draw at you, and potentialy only going home with 1/2 or 1/4 of it, in a pot-limit game anyhow. Additionally, you want to pressure hands that have signiicant equity into folding thereby giving yourself a better scooping or 3/4ing chance, so for me this seems like more of a pushing situation. Although it's not the case, the TWO flop calls on an uncoordinated flop make it seem likely that an A3 is out, so you're only splitting the low most of the time anyhow, you don't particularly want to pay more money just to get 1/4 of a 3-way pot, unless you can improve your high chances somehow.
I think you underestimate how often people chase naked low draws in PL games
- although it wasn't the case here, at least one oppo usually has A3 here. In this case, there was one guy on a scabby draw anyhow so you want to make him pay, regardless.